WO2003005390A1 - Commutateur d'ecran tactile - Google Patents

Commutateur d'ecran tactile Download PDF

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Publication number
WO2003005390A1
WO2003005390A1 PCT/JP2002/006874 JP0206874W WO03005390A1 WO 2003005390 A1 WO2003005390 A1 WO 2003005390A1 JP 0206874 W JP0206874 W JP 0206874W WO 03005390 A1 WO03005390 A1 WO 03005390A1
Authority
WO
WIPO (PCT)
Prior art keywords
touch panel
panel switch
electrode
insulating sheet
spacer
Prior art date
Application number
PCT/JP2002/006874
Other languages
English (en)
Japanese (ja)
Inventor
Toshiharu Fukui
Takuo Osaki
Hiroshi Moroi
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to US10/363,673 priority Critical patent/US6831241B2/en
Priority to KR1020037000909A priority patent/KR100548913B1/ko
Publication of WO2003005390A1 publication Critical patent/WO2003005390A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/002—Layer thickness
    • H01H2227/006—Spacer

Definitions

  • the present invention relates to a touch panel switch used in an input operation unit of an electronic device and capable of inputting a signal by performing a pressing operation with a finger or a dedicated pen.
  • a flat touch panel switch capable of performing an input operation by pressing with a light force with a finger or a dedicated pen has been often used for an input operation unit of an electronic device.
  • a transparent touch panel switch that is superimposed on a liquid crystal display (hereinafter referred to as LCD) and that performs input operations according to the contents displayed on the LCD.
  • LCD liquid crystal display
  • FIG. 6 is a cross-sectional view of a conventional transparent touch panel switch.
  • a transparent thin-film first electrode 20 is provided on the lower surface of a transparent and flexible insulating sheet 10. It is formed of indium oxide containing tin (hereinafter referred to as ITO) or the like.
  • a second electrode 40 made of ITO or the like is provided on the upper surface of a transparent insulating substrate 30 such as glass provided below the insulating sheet 10 at a predetermined distance from the first electrode 20. And are disposed so as to face each other.
  • the outer periphery of the insulating sheet 10 is held.
  • An adhesive 50 is applied to the portion, an insulating layer 60 is fixed to an outer peripheral portion of the insulating substrate 30 on the second electrode 40 side, and the adhesive 50 and the insulating layer 60 are laminated.
  • Predetermined Laminate to make it thick.
  • Such a transparent touch panel switch is usually arranged so as to be superimposed on a display screen such as an LCD provided in an electronic device.
  • the operator of the electronic device can visually recognize the operation instructions and selection information displayed on the display screen through the touch panel switch, and accordingly, according to the operation instructions and selection information, the insulating sheet 10 of the touch panel switch.
  • an input operation for causing the electronic device to perform a desired operation can be performed.
  • the operation of the touch panel switch at this time will be described. That is, the flexible insulating sheet 10 pressed by a finger or a dedicated pen bends downward, and the first electrode 20 on the lower surface of the insulating sheet 10 is connected to the second electrode 40 on the insulating substrate 30.
  • the contact makes a switch, whereby a signal can be input to a circuit of the electronic device connected to the first electrode 20 and the second electrode 40.
  • an electronic device using such a touch panel switch usually has a touch panel switch that can perform an input operation with an area of a display screen corresponding to its use and an area approximately equal to that.
  • a control circuit in the electronic device simultaneously displays a plurality of operation instructions and selection information on the display screen, and a touch panel switch outputs different signals corresponding to the positions where the respective operation instructions and selection information are displayed. The output is made so that the electronic device performs the operation desired by the operator.
  • the conventional touch panel switch described above when the insulating sheet 10 is pressed and input, the pressure-sensitive adhesive 50 and the insulating layer 60 are pressed down to the combined thickness.
  • the outer peripheral portion of the touch panel switch that is, in the vicinity of the portion where the adhesive 50 and the insulating layer 60 are attached
  • the first sheet of the insulating sheet 10 and the ITO formed on the lower surface thereof is pressed.
  • a large stress is applied to the electrode 20. Due to this stress, when input is repeated near the area where the adhesive 50 and the insulating layer 60 are attached, the function of the thin-film first electrode 20 as the electrode deteriorates near the pressing position. And the generation of a predetermined input signal may be hindered.
  • an insulating sheet provided with the electrodes and an insulating substrate are adhesively fixed at a predetermined location with an insulating layer interposed therebetween so that the planar electrodes face each other at a predetermined interval.
  • the part excluding the adhesive part is made to function as a switch. If the pressing operation near the adhesive point is repeated, the function of the planar electrode tends to deteriorate, so the area near the adhesive point in the peripheral area cannot be used as an operation area that becomes a switch contact from the viewpoint of reliability. There has been a problem that the effective use area that can be used as an operation area is reduced.
  • Japanese Patent Application Laid-Open No. H04-143438 describes that the use of an elastic body as a gap holding material provided in the operation area improves the reliability of repeated pressing on the same place.
  • the part uses a double-sided adhesive frame material and does not disclose any measures against deterioration near the periphery.
  • an example in which an elastic body is used as a spacer in the peripheral portion is described in Japanese Patent Application Laid-Open No. 4-1238728. This is a spacer made by attaching an elastic body coated with an adhesive on both sides for the purpose of eliminating the sagging of the film due to temperature and humidity.
  • Disclosure of the invention is not disclosure of the invention.
  • the present invention solves such a conventional problem, and an object of the present invention is to provide a touch panel switch capable of increasing an effective use area.
  • a touch panel switch of the present invention provides a touch panel switch including a flexible insulating sheet having a first electrode and an insulating substrate having a second electrode provided through a spacer provided in a peripheral portion.
  • a data Tutsi panel sweep rate Tutsi the electrodes to each other formed by opposed, the spacer is, is an elastic body of the elastic modulus l X 1 0 5 ⁇ l X 1 0 7 dyne // cm 2 It is characterized by the following. Since the insulating layer has appropriate elasticity, even if the flexible insulating sheet is pressed in the vicinity of the portion where the flexible insulating sheet and the insulating substrate are bonded, the flexible insulating sheet will respond to bending.
  • the insulating layer is deformed in a direction to reduce its thickness, and the deformation stress on the flexible insulating sheet and the lower surface of the first electrode is reduced. If the effective area can be increased by expanding the area that can be used as a material, it has a function.
  • FIG. 1 is a cross-sectional view of a touch panel switch according to a first embodiment of the present invention.
  • FIG. 2 is a partially enlarged cross-sectional view of the touch panel switch.
  • FIG. 4 is a partially enlarged sectional view of the touch panel switch.
  • FIG. 5 is a sectional view of a touch panel switch according to a second embodiment of the present invention.
  • FIG. 6 is a cross-sectional view of a conventional touch panel switch.
  • FIG. 7 is an enlarged sectional view of the same portion of a conventional touch panel switch.
  • One touch panel switch of the present invention has a structure in which a flexible insulating sheet having a first electrode and an insulating substrate having a second electrode are opposed to each other via a spacer provided in a peripheral portion.
  • the spacer is, are characterized in that the bow unisexual ratio is 1 0 5-1 0 7 elastic body dyne Z cm 2, scan Bae one support is an elastic Therefore, even if the flexible insulating sheet is pressed in the vicinity of the portion where the flexible insulating sheet and the insulating substrate are attached, the spacer is formed according to the radius of the flexible insulating sheet.
  • the elastic modulus of the spacer is greater than 1 X 1 0 7 dyne Z cm 2 in elastic modulus is too high, it can not be obtained moderate deformation upon pressing a flexible insulating sheet in the vicinity of the joining portion Therefore, the effect of reducing the deformation stress on the first electrode on the lower surface of the flexible insulating sheet is small, and it is difficult to suppress the functional deterioration of the first electrode due to repeated pressing on the flexible insulating sheet.
  • the touch panel switch according to the present invention is such that the ratio of the maximum value and the minimum value of the elastic modulus at different environmental temperatures within the environmental temperature range of 10 ° C to 60 ° C is 10 times or less. is there.
  • the ratio of the elastic modulus of the spacer is 10 times or less.
  • the environmental temperature can be reduced. This has the effect of reducing the difference in pressing force when pressing the flexible insulating sheet between when the temperature is low and when it is high.
  • the thickness of the end of the insulating layer is gradually reduced in the direction of the operation region.
  • the insulating layer deforms in a direction to reduce its thickness in accordance with the bending of the flexible insulating sheet, and the end of the insulating layer is inclined.
  • the flexible insulating sheet bends along the inclined portion of the insulating layer, and the flexible insulating sheet and the first electrode on the lower surface thereof This has the effect of further reducing the deformation stress on the substrate.
  • the insulating layer imparts adhesiveness to itself, thereby removing the adhesive.
  • the flexible insulating sheet and the insulating substrate can be attached only by the insulating layer, so that the step of applying the adhesive can be omitted, and an inexpensive touch panel switch can be provided.
  • the touch panel switch of the present invention is also a touch panel switch that makes the flexible insulating sheet, the first electrode, the insulating substrate, and the second electrode light-transmissive. Since it is light-transmissive, it can be installed on the top of the display element, allowing the operator to perform input operations according to the displayed content while visually checking the transmitted display. This has the effect of providing a touch panel switch.
  • Another touch panel switch of the present invention includes a flexible insulating sheet having a first electrode, a second electrode facing the first electrode, and a rigid body from below.
  • An adhesive is applied to a predetermined portion of the flexible insulating sheet or the lower insulating sheet so that the two electrodes have a predetermined interval, and the lower insulating sheet supported by the substrate is elastically laminated on the adhesive.
  • the insulating layer is deformed in a direction to reduce its thickness in accordance with the bending of the flexible insulating sheet, and reduces the deformation stress on the flexible insulating sheet and the first electrode on the lower surface thereof. Therefore, the functional deterioration of the first electrode is suppressed This has the effect of expanding the area that can be used as a switch contact and increasing the effective use area.
  • the insulating layer is deformed in a direction to reduce the thickness, so the load required for pressing can be reduced, and the input operation can be performed with a lighter pressing force. This has the effect of realizing a touch panel switch having excellent operability.
  • the thin-film planar second electrode can be formed on the flexible insulating sheet in the same manner as the first electrode, the flexible insulating sheet and the lower insulating sheet are made of a common material, This has the effect that the touch panel switch can be made inexpensive.
  • FIG. 1 is a sectional view illustrating a touch panel switch according to the first embodiment of the present invention.
  • an insulating sheet 10 is flexible, and a resin such as polyethylene terephthalate, polyethersulfone, polyethylene naphthalate, polycarbonate, norbornene resin is formed into a transparent sheet by a stretching method or a casting method. Things.
  • a planar first electrode 20 made of a light-transmitting ITO thin film is formed on the lower surface of the flexible insulating sheet 10 by a sputtering method or the like.
  • the insulating substrate 30 is a rigid substrate made of a transparent material such as glass, polycarbonate, and ataryl, and the upper surface of the insulating substrate 30 is also provided with a sputtering method, like the first electrode 20. Thereby, a light-transmissive second electrode 40 having a thin film shape of ITO is formed.
  • An adhesive 50 having a predetermined width and a predetermined thickness is formed on a peripheral portion on the lower surface side of the first electrode 20 by a screen printing method.
  • the adhesive is a material mainly composed of acrylic, polyester, silicon and the like. Although not shown, the adhesive 50 is applied over the entire periphery of the lower surface of the flat flexible insulating sheet.
  • a paste-shaped insulating material is applied to the peripheral portion on the upper surface side of the second electrode 40 at a position facing the adhesive in a similar shape by using a screen printing method, and is heated and cured to a predetermined width.
  • an insulating layer 70 having a predetermined thickness are also suitable printing methods.
  • Other suitable printing methods include a method capable of patterning such as Daravia printing and die coating, and a method of spray coating through a mask.
  • a resin having rubber-like elasticity such as silicon, urethane, butadiene, or bull-based resin, or an epoxy resin modified with the above-mentioned descent can be used.
  • the touch panel switch of the present invention is completed by attaching the insulating sheet 10 and the insulating substrate 30 in a state where the above-mentioned adhesive 50 and the insulating layer 70 are arranged so as to overlap each other.
  • the thickness of the insulating layer 70 is 30 jum, and the thickness of the adhesive 50 is 15 ⁇ m.
  • Measuring the modulus of elasticity for the insulating layer 3 0 mu m and a pressure-sensitive adhesive 1 5 mu m laminate was 1 X 1 0 6 dyne Z cm 2.
  • FIG. 2 is a partially enlarged cross-sectional view of the touch panel switch configured as shown in FIG. 1, showing a state in which the upper surface of the insulating sheet 10 is pressed near a portion where the insulating sheet 10 and the insulating substrate 30 are attached. Is shown.
  • the insulating layer 70 having rubber-like elasticity is deformed so as to reduce its thickness on the pressed side of the insulating sheet 10,
  • the elastic adhesive 50 is also slightly elastically deformed.
  • the spacer that is, the laminated body of the insulating layer 70 and the adhesive 50 is elastically deformed along the radius, and the thickness of the pressed side is reduced. Therefore, the radius of the insulating sheet 10 and the first electrode 20 on the lower surface thereof is smaller than that of the conventional touch panel switch.
  • a keying test was performed at a position of 1.0 mm from the end of the insulating layer of the touch panel switch with a pressing force of 2.45 Newton, and the initial performance was maintained without deterioration even after 100,000 times. I was sure that.
  • the elasticity of the insulating layer 70 can suppress functional deterioration of the first electrode 20 due to repetition of the pressing operation in the vicinity of the attachment portion, and therefore, The pressing operation can be performed even in the vicinity.
  • the area that can be used as a switch contact can be extended to the periphery, and a touch panel switch with a large effective use area can be realized.
  • the display area of the display device can be used without waste, and a highly convenient touch panel switch can be provided. .
  • the ratio of the maximum value to the minimum value of the elastic modulus of the insulating layer 70 at different environmental temperatures in the range of 110 ° C to 60 ° C, which is the normal operating temperature range of electronic devices, is 10 By making it twice or less, the difference in pressing force when pressing the flexible insulating sheet between when the environmental temperature is low and when it is high can be suppressed.
  • the insulating layer 80 is deformed in a direction to decrease its thickness in accordance with the bending of the insulating sheet 10, and in addition to the end of the insulating layer 80.
  • the insulating sheet 10 is bent along the inclined portion of the insulating layer 80 when pressed, and deforms the insulating sheet 10 and the first electrode 20 on the lower surface of the insulating sheet 10 when pressed. It is possible to further reduce the resistance, and to improve the durability of the first electrode 20 against repeated pressing operations in the vicinity of the attached portion.
  • the insulating layer 90 has adhesiveness, and the insulating sheet 10 and the insulating substrate 30 are attached by the insulating layer 90.
  • the adhesive can be removed, and the step of applying the adhesive can be omitted, and the touch panel switch can be made inexpensive.
  • the insulating layer I 0 is assumed weak bonding strength in the gel-like, it is peeled off Ya easier insulating sheet 1 0 and the insulating substrate 3 0 There is a disadvantage that.
  • the elastic modulus of the spacer is greater than 1 X 1 0 7 dyne Z cm 2 is too high elastic modulus, since moderate deformation when pressed insulating sheet 1 0 in the vicinity of the joining portion can not be obtained However, the effect of reducing the deformation stress on the first electrode 20 on the flexible insulating sheet and the lower surface thereof is small, and it is difficult to suppress the functional deterioration of the first electrode 20 due to repeated pressing on the insulating sheet 10.
  • thermosetting epoxy resin as the insulating layer 70
  • a touch panel having the same configuration as that of the above-described embodiment was produced.
  • Modulus of the laminate of the insulating layer and the adhesive layer of the first embodiment was l X 1 0 8 dyne / cm 2.
  • a keystroke test was performed at a pressure of 2.45 Newton at a position 2.5 mm from the end of the insulating layer of the touch panel switch. The switch function deteriorated 100,000 times.
  • the touch panel switch of the present invention has sufficient durability for the keying test and the sliding test even near 1.Omm from the end of the insulating layer, and the area inside the touch panel switch is effective as the operation area. Available to This has a special effect on small touch panel switches, such as portable information terminals and mobile phones, where the ratio of the peripheral portion to the entire operation area is high.
  • the insulating layer 70 is formed on the insulating substrate 30 and the adhesive is formed on the insulating sheet.
  • the insulating layer may be formed on the insulating sheet.
  • Embodiment 2 another touch panel switch of the present invention will be described.
  • the same components as those of the first embodiment are denoted by the same reference numerals.
  • FIG. 5 is a cross-sectional view of a touch panel switch according to a second embodiment of the present invention.
  • another flexible insulating sheet 12 has the same structure as that of the first embodiment.
  • a resin such as polyethylene terephthalate, polyether sulfone, polyethylene naphthalate, polycarbonate, norbornene-based resin or the like is formed into a transparent sheet by a stretching method or a casting method.
  • the second electrode 40 of ITO is formed on the upper surface of the other insulating sheet 12.
  • the other insulating sheet 12 is attached to the upper surface of the substrate 32 by an adhesive 52 applied to the upper surface of a rigid substrate 32 made of a transparent material such as glass, polycarbonate, or acrylic. I have.
  • the other parts including the insulating layer 70 having rubber-like elasticity are the same as those according to the first embodiment to constitute a touch panel switch.
  • the operation of the touch panel switch of the second embodiment is the same as that of the first embodiment, and a description thereof will be omitted.
  • the second embodiment it is possible to realize a touch panel switch having a large effective use area in the same manner as in the first embodiment, and to provide another insulating panel having the second electrode 40 on the upper surface. Since the sheet 12 can be formed of the same material as the insulating sheet 10 having the first electrode 20, the number of steps of attaching the substrate 32 increases, but an electrode having a high cost ratio can be formed only with the same material. Therefore, it is possible to provide an inexpensive touch panel.
  • the ratio of the maximum value to the minimum value of the elastic modulus at different environmental temperatures within the temperature range shall be 10 times or less, the use of an insulating layer 80 with a gradually reduced end thickness, and adhesion
  • the insulating layer 90 provided, a similar effect can be obtained in the second embodiment.
  • the present invention is used in an input operation unit of an electronic device, and has a wide usable area as a touch panel switch capable of inputting a signal by performing a pressing operation with a finger or a dedicated pen.
  • Large touch panel switches can be provided.
  • it is useful as a small touch panel switch with a high ratio of the peripheral portion to the entire operation area, such as a portable information terminal or a mobile phone.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Push-Button Switches (AREA)
  • Position Input By Displaying (AREA)

Abstract

L'invention concerne un commutateur d'écran tactile offrant une large plage de fonctionnement utile et ainsi une grande zone d'utilisation efficace. Ce commutateur est pourvu d'électrodes montées de façon opposée, par l'intermédiaire d'un élément d'espacement placé autour de leur périphérie, cet élément d'espacement étant constitué d'un corps élastique présentant un module d'élasticité de 1 x 105 à 1 x 107 dyne/cm2 et comprenant une couche isolante et une couche adhésive. Cette couche isolante comprend en outre une partie de maintien d'espace libre présentant une épaisseur uniforme et une partie inclinée dont l'épaisseur décroît graduellement de sorte que cette partie de maintien d'espace libre prend la forme d'un substrat sur lequel sont formées les électrodes.
PCT/JP2002/006874 2001-07-06 2002-07-05 Commutateur d'ecran tactile WO2003005390A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/363,673 US6831241B2 (en) 2001-07-06 2002-07-05 Touch panel switch
KR1020037000909A KR100548913B1 (ko) 2001-07-06 2002-07-05 터치 패널 스위치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001-205848 2001-07-06
JP2001205848A JP4055378B2 (ja) 2001-07-06 2001-07-06 タッチパネルスイッチ

Publications (1)

Publication Number Publication Date
WO2003005390A1 true WO2003005390A1 (fr) 2003-01-16

Family

ID=19042080

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/006874 WO2003005390A1 (fr) 2001-07-06 2002-07-05 Commutateur d'ecran tactile

Country Status (6)

Country Link
US (1) US6831241B2 (fr)
JP (1) JP4055378B2 (fr)
KR (1) KR100548913B1 (fr)
CN (1) CN100495613C (fr)
TW (1) TW552602B (fr)
WO (1) WO2003005390A1 (fr)

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JPH04143823A (ja) * 1990-10-05 1992-05-18 Sumitomo Bakelite Co Ltd 透視型タッチパネル
JP2714124B2 (ja) * 1989-04-13 1998-02-16 日東電工株式会社 透明導電性積層体
WO1998022867A1 (fr) * 1996-11-21 1998-05-28 Seiko Epson Corporation Dispositif d'entree, dispositif a cristaux liquides et materiel electronique utilisant ledit dispositif a cristaux liquides
JPH10199367A (ja) * 1997-01-13 1998-07-31 Tokai Rubber Ind Ltd ホーンスイッチ
JPH10255591A (ja) * 1997-03-07 1998-09-25 Alps Electric Co Ltd メンブレンスイッチ、およびこのメンブレンスイッチを用いた圧力検出装置。

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JP2714124B2 (ja) * 1989-04-13 1998-02-16 日東電工株式会社 透明導電性積層体
JPH03109233U (fr) * 1990-02-22 1991-11-11
JPH04123728A (ja) * 1990-09-14 1992-04-23 Hitachi Aic Inc タッチパネル
JPH04143823A (ja) * 1990-10-05 1992-05-18 Sumitomo Bakelite Co Ltd 透視型タッチパネル
WO1998022867A1 (fr) * 1996-11-21 1998-05-28 Seiko Epson Corporation Dispositif d'entree, dispositif a cristaux liquides et materiel electronique utilisant ledit dispositif a cristaux liquides
JPH10199367A (ja) * 1997-01-13 1998-07-31 Tokai Rubber Ind Ltd ホーンスイッチ
JPH10255591A (ja) * 1997-03-07 1998-09-25 Alps Electric Co Ltd メンブレンスイッチ、およびこのメンブレンスイッチを用いた圧力検出装置。

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CN100495613C (zh) 2009-06-03
US20040027761A1 (en) 2004-02-12
KR100548913B1 (ko) 2006-02-02
CN1463459A (zh) 2003-12-24
JP4055378B2 (ja) 2008-03-05
JP2003022729A (ja) 2003-01-24
US6831241B2 (en) 2004-12-14
KR20030022299A (ko) 2003-03-15

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